package Demo;
import java.util.Scanner;
/*public class test {
    public static void main(String[] args) {
        int []arry={1,2,3,4,5};
        int []arry2={9,8,7,6,5};
        int []tmp;
        tmp=arry;
        arry=arry2;
        arry2=tmp;
        for(int i=0;i<arry.length;i++){
            System.out.print(arry[i]+" ");
        }
        System.out.println();
        for(int i=0;i<arry2.length;i++){
            System.out.print(arry2[i]+" ");
        }
    }
}*/
class Base{
    public Base(){
        System.out.print("B");
    }
}

public class test extends Base{
    public test () {
        System.out.print("D");
    }
    public static void main(String[] args){
        new test();
    }
}